What are they doing?
They are in the playground.
What is she doing?
She is doing exercises.
What are they doing?
They are having lunch.
What are they doing?
They are in the library.
What is she doing?
She is studying.
What is she doing?
She is doing homework.
What is it?
It's a cafeteria.
What is it?
It's a classroom.
What is it?
It's a gym.
What is it?
It's a computer lab.